[JSF/SWF] drop down list submit problem

[jamesclinton]

[jsf/swf]

In the sellitem-jsf example, the drop down list has hardcoded items. Currently we are hitting problems when submitting the list based on dynamic data.

SWF Example

<h:selectOneMenu id="select_roles" value="#{flowScope.userAddCommand.roleId}">
  <f:selectItem itemLabel="None (0.02 discount rate)" itemValue=""/>
  <f:selectItem itemLabel="Cat. A (0.1 discount rate when more than 100 items)" itemValue="A"/>
  <f:selectItem itemLabel="Cat. B (0.2 discount rate when more than 200 items)" itemValue="B"/>
</h:selectOneMenu>

Our dynamically populated list.

<h:selectOneMenu id="select_roles" value="#{flowScope.userAddCommand.roleId}">              
  <f:selectItems value="${roles}" />
</h:selectOneMenu>

The list displays fine, its on sumbit it falls over.

The list is a collection of SelectItem objects.

${roles} is put into flowScope by:

<method-result name="roles"/>

Are we missing something fundemental here?

kind regards

[autolico]

The list displays fine, its on sumbit it falls over

do you get any exception?

[jamesclinton]

as requested:

javax.faces.FacesException: Value binding '${roles}'of UISelectItems with component-path {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /pages/user/userRegistrationForm.xhtml][Class: javax.faces.component.html.HtmlForm,Id: registrationForm][Class: javax.faces.component.html.HtmlSelectOneMenu,Id: select_roles][Class: javax.faces.component.UISelectItems,Id: _id11]} does not reference an Object of type SelectItem, SelectItem[], Collection or Map but of type : null 
de.mindmatters.faces.lifecycle.ProcessValidationsPhase.executePhase(ProcessValidationsPhase.java:48) 
de.mindmatters.faces.lifecycle.AbstractPhase.execute(AbstractPhase.java:37) 
de.mindmatters.faces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:166) 
de.mindmatters.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:211) 
javax.faces.webapp.FacesServlet.service(FacesServlet.java:137) 
org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144) 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

Clearly there is something wrong in the way the state is handled, because if elements are hardcoded into the list things are ok, maybe its the way I am populating the list via a service call in a render-action.

<render-actions>
  <bean-action bean="userDelegateService" method="findAllRoles">
   <method-result name="roles"/>
  </bean-action>
</render-actions>

regards,

[autolico]

I see things I am not completely sure about...

First of all ${role} seems to be a jstl expression instead of a jsf one, I am a bit surprised that you can see the select item list like that...

Then I would try to bind the method-result explicitly to the flowScope since I am personally never sure which is the default one (I wouldn't bet on it but most of the time it turned out to be the requestScope), something like

<method-result name="roles" scope="flow"/>

and then trying to access the value in a way like this:

<f:selectItems value="#{flowScope.roles}" />

let me know

[jamesclinton]

Your right. Cheers!